Household Casebearer / Plaster Bagworm

Found indoors, predominantly in humid areas on walls or ceilings, near silk-producing spiders or dust.

Scavenger that feeds on spider webs, wool, hair, and various proteinaceous debris like dead insects.

The larva constructs a protective silk case flattened in the middle and open at both ends to allow the insect to emerge and feed from either side; it drags the case as it grows and eventually pupates inside.

Harmless to humans; while they may damage natural fiber textiles like wool or silk, they primarily act as household scavengers of dust and organic debris.